I did a search here and couldn't find anything but since finding this site in me quest to improve my astrophotography I though I might ask the knowledgeable amongst us.

I want to use my intervalometer on my D200 to take a 30sec exposure one after the other. I have read the manual, searched the web and even got an answer from Nikon direct and nothing works. The closet I have got is for the camera to take a 25sec exposure one after the other which is ok.

So has anyone successfully used the D200 intervalometer and taken a series of 30sec exposures one after the other?

I searched his site a lot and just couldn't find this golden nugget of information. It clears up how the intervalometer works.

The problem I was having was setting a 30sec interval and a 30sec shutter speed. The D200 needed an extra 2 seconds (32sec interval) so it could transfer the shot, presumably, to the buffer. Now for startrails this would result in gaps in the trails.

What I have found is that a 26sec interval works with a 25sec shutter speed and there are no gaps in the trails.

As for the software solution, I didn't think of that. I will look into it.